chiark / gitweb /
analyze: change behaviour of combined --to/from--pattern
[elogind.git] / man / journald.conf.xml
index d7caea83cce6018be4d8b6a1eaba63c403b917c2..364b58f07e36f7d2d6feac71bd9d95b4c05c8a17 100644 (file)
@@ -1,7 +1,6 @@
 <?xml version='1.0'?> <!--*-nxml-*-->
-<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
   This file is part of systemd.
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 -->
 
-<refentry id="journald.conf">
-        <refentryinfo>
-                <title>journald.conf</title>
-                <productname>systemd</productname>
-
-                <authorgroup>
-                        <author>
-                                <contrib>Developer</contrib>
-                                <firstname>Lennart</firstname>
-                                <surname>Poettering</surname>
-                                <email>lennart@poettering.net</email>
-                        </author>
-                </authorgroup>
-        </refentryinfo>
-
-        <refmeta>
-                <refentrytitle>journald.conf</refentrytitle>
-                <manvolnum>5</manvolnum>
-        </refmeta>
-
-        <refnamediv>
-                <refname>journald.conf</refname>
-                <refpurpose>Journal service configuration file</refpurpose>
-        </refnamediv>
-
-        <refsynopsisdiv>
-                <para><filename>/etc/systemd/journald.conf</filename></para>
-        </refsynopsisdiv>
-
-        <refsect1>
-                <title>Description</title>
-
-                <para>This files configures various parameters of the
-                systemd journal service
-                <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
-
-        </refsect1>
-
-        <refsect1>
-                <title>Options</title>
-
-                <para>All options are configured in the
-                <literal>[Journal]</literal> section:</para>
-
-                <variablelist>
-
-                        <varlistentry>
-                                <term><varname>Compress=</varname></term>
-
-                                <listitem><para>Takes a boolean
-                                value. If enabled (the default) data
-                                objects that shall be stored in the
-                                journal and are larger than a certain
-                                threshold are compressed with the XZ
-                                compression algorithm before they are
-                                written to the file
-                                system.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>RateLimitInterval=</varname></term>
-                                <term><varname>RateLimitBurst=</varname></term>
-
-                                <listitem><para>Configures the rate
-                                limiting that is applied to all
-                                messages generated on the system. If
-                                in the time interval defined by
-                                <varname>RateLimitInterval=</varname>
-                                more messages than specified in
-                                <varname>RateLimitBurst=</varname> are
-                                logged by a service all further
-                                messages within the interval are
-                                dropped, until the interval is over. A
-                                message about the number of dropped
-                                messages is generated. This rate
-                                limiting is applied per-service, so
-                                that two services which log do not
-                                interfere with each other's
-                                limit. Defaults to 100 messages in
-                                10s. The time specification for
-                                <varname>RateLimitInterval=</varname>
-                                may be specified in the following
-                                units: <literal>s</literal>,
-                                <literal>min</literal>,
-                                <literal>h</literal>,
-                                <literal>ms</literal>,
-                                <literal>us</literal>. To turn off any
-                                kind of rate limiting, set either
-                                value to 0.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>SystemMaxUse=</varname></term>
-                                <term><varname>SystemKeepFree=</varname></term>
-                                <term><varname>SystemMaxFileSize=</varname></term>
-                                <term><varname>SystemMinFileSize=</varname></term>
-                                <term><varname>RuntimeMaxUse=</varname></term>
-                                <term><varname>RuntimeKeepFree=</varname></term>
-                                <term><varname>RuntimeMaxFileSize=</varname></term>
-                                <term><varname>RuntimeMinFileSize=</varname></term>
-
-                                <listitem><para>Enforce size limits on
-                                the journal files stored. The options
-                                prefixed with
-                                <literal>System</literal> apply to the
-                                journal files when stored on a
-                                persistent file system, more
-                                specifically
-                                <filename>/var/log/journal</filename>. The
-                                options prefixed with
-                                <literal>Runtime</literal> apply to
-                                the journal files when stored on a
-                                volatile in-memory file system, more
-                                specifically
-                                <filename>/run/log/journal</filename>. The
-                                former is used only when
-                                <filename>/var</filename> is mounted,
-                                writable and the directory
-                                <filename>/var/log/journal</filename>
-                                exists. Otherwise only the latter
-                                applies. Note that this means that
-                                during early boot and if the
-                                administrator disabled persistent
-                                logging only the latter options apply,
-                                while the former apply if persistent
-                                logging is enabled and the system is
-                                fully booted
-                                up. <varname>SystemMaxUse=</varname>
-                                and <varname>RuntimeMaxUse=</varname>
-                                control how much disk space the
-                                journal may use up at
-                                maximum. Defaults to 10% of the size
-                                of the respective file
-                                system. <varname>SystemKeepFree=</varname>
-                                and
-                                <varname>RuntimeKeepFree=</varname>
-                                control how much disk space the
-                                journal shall always leave free for
-                                other uses if less than the disk space
-                                configured in
-                                <varname>SystemMaxUse=</varname> and
-                                <varname>RuntimeMaxUse=</varname> is
-                                available. Defaults to 5% of the size
-                                of the respective file
-                                system. <varname>SystemMaxFileSize=</varname>
-                                and
-                                <varname>RuntimeMaxFileSize=</varname>
-                                control how large individual journal
-                                files may grow at maximum. This
-                                influences the granularity in which
-                                disk space is made available through
-                                rotation, i.e. deletion of historic
-                                data. Defaults to one eighth of the
-                                values configured with
-                                <varname>SystemMaxUse=</varname> and
-                                <varname>RuntimeMaxUse=</varname>, so
-                                that usually seven rotated journal
-                                files are kept as
-                                history. <varname>SystemMinFileSize=</varname>
-                                and
-                                <varname>RuntimeMinFileSize=</varname>
-                                control how large individual journal
-                                files grow at minimum. Defaults to
-                                64K. Specify values in bytes or use
-                                K, M, G, T, P, E as units for the
-                                specified sizes. Note that size limits
-                                are enforced synchronously to journal
-                                files as they are extended, and need
-                                no explicit rotation step triggered by
-                                time.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>ForwardToSyslog=</varname></term>
-                                <term><varname>ForwardToKMsg=</varname></term>
-                                <term><varname>ForwardToConsole=</varname></term>
-
-                                <listitem><para>Control whether log
-                                messages received by the journal
-                                daemon shall be forwarded to a
-                                traditional syslog daemon, to the
-                                kernel log buffer (kmsg), or to the
-                                system console. These options take
-                                boolean arguments. If forwarding to
-                                syslog is enabled but no syslog daemon
-                                is running the respective option has
-                                no effect. By default only forwarding
-                                to syslog is enabled. These settings
-                                may be overridden at boot time with the
-                                kernel command line options
-                                <literal>systemd.journald.forward_to_syslog=</literal>,
-                                <literal>systemd.journald.forward_to_kmsg=</literal>
-                                and
-                                <literal>systemd.journald.forward_to_console=</literal>. If
-                                forwarding to the kernel log buffer and
-                                <varname>ImportKernel=</varname> is
-                                enabled at the same time care is taken
-                                to avoid logging loops. It is safe to
-                                use these options in combination.
-                                </para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>MaxLevelStore=</varname></term>
-                                <term><varname>MaxLevelSyslog=</varname></term>
-                                <term><varname>MaxLevelKMsg=</varname></term>
-                                <term><varname>MaxLevelConsole=</varname></term>
-
-                                <listitem><para>Controls the maximum
-                                log level of messages that are stored
-                                on disk, forwarded to syslog, kmsg or
-                                the console (if that is enabled, see
-                                above). As argument, takes one of
-                                <literal>emerg</literal>,
-                                <literal>alert</literal>,
-                                <literal>crit</literal>,
-                                <literal>err</literal>,
-                                <literal>warning</literal>,
-                                <literal>notice</literal>,
-                                <literal>info</literal>,
-                                <literal>debug</literal> or integer
-                                values in the range of 0..7 (corresponding
-                                to the same levels). Messages equal or below
-                                the log level specified are
-                                stored/forwarded, messages above are
-                                dropped. Defaults to
-                                <literal>debug</literal> for
-                                <varname>MaxLevelStore=</varname> and
-                                <varname>MaxLevelSyslog=</varname>, to
-                                ensure that the all messages are
-                                written to disk and forwarded to
-                                syslog. Defaults to
-                                <literal>notice</literal> for
-                                <varname>MaxLevelKMsg=</varname> and
-                                <literal>info</literal> for
-                                <varname>MaxLevelConsole=</varname>.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>TTYPath=</varname></term>
-
-                                <listitem><para>Change the console TTY
-                                to use if
-                                <varname>ForwardToConsole=yes</varname>
-                                is used. Defaults to
-                                <filename>/dev/console</filename>.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>ImportKernel=</varname></term>
-
-                                <listitem><para>Controls whether
-                                kernel log messages shall be stored in
-                                the journal. Takes a boolean argument
-                                and defaults to disabled. Note that
-                                currently only one userspace service
-                                can read kernel messages at a time,
-                                which means that kernel log message
-                                reading might get corrupted if it
-                                is enabled in more than one service,
-                                for example in both the journal and a
-                                traditional syslog service.
-                                </para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>Storage=</varname></term>
-
-                                <listitem><para>Controls where to
-                                store journal data. One of
-                                <literal>volatile</literal>,
-                                <literal>persistent</literal>,
-                                <literal>auto</literal> and
-                                <literal>none</literal>. If
-                                <literal>volatile</literal> journal
-                                log data will be stored only in
-                                memory, i.e. below the
-                                <filename>/run/log/journal</filename>
-                                hierarchy (which is created if
-                                needed). If
-                                <literal>persistent</literal> data will
-                                be stored preferably on disk,
-                                i.e. below the
-                                <filename>/var/log/journal</filename>
-                                hierarchy (which is created if
-                                needed), with a fallback to
-                                <filename>/run/log/journal</filename>
-                                (which is created if needed), during
-                                early boot and if the disk is not
-                                writable. <literal>auto</literal> is
-                                similar to
-                                <literal>persistent</literal> but the
-                                directory
-                                <filename>/var/log/journal</filename>
-                                is not created if needed, so that its
-                                existence controls where log data
-                                goes. <literal>none</literal> turns
-                                off all storage, all log data received
-                                will be dropped. Forwarding to other
-                                targets, such as the console, the
-                                kernel log buffer or a syslog daemon
-                                will still work however.  Defaults to
-                                <literal>auto</literal>.</para></listitem>
-                        </varlistentry>
-                </variablelist>
-
-        </refsect1>
-
-        <refsect1>
-                  <title>See Also</title>
-                  <para>
-                          <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>systemd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-                  </para>
-        </refsect1>
+<refentry id="journald.conf"
+    xmlns:xi="http://www.w3.org/2001/XInclude">
+  <refentryinfo>
+    <title>journald.conf</title>
+    <productname>systemd</productname>
+
+    <authorgroup>
+      <author>
+        <contrib>Developer</contrib>
+        <firstname>Lennart</firstname>
+        <surname>Poettering</surname>
+        <email>lennart@poettering.net</email>
+      </author>
+    </authorgroup>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>journald.conf</refentrytitle>
+    <manvolnum>5</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>journald.conf</refname>
+    <refname>journald.conf.d</refname>
+    <refpurpose>Journal service configuration files</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <para><filename>/etc/systemd/journald.conf</filename></para>
+    <para><filename>/etc/systemd/journald.conf.d/*.conf</filename></para>
+    <para><filename>/run/systemd/journald.conf.d/*.conf</filename></para>
+    <para><filename>/usr/lib/systemd/journald.conf.d/*.conf</filename></para>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para>These files configure various parameters of the systemd
+    journal service,
+    <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
+
+  </refsect1>
+
+  <xi:include href="standard-conf.xml" xpointer="confd" />
+  <xi:include href="standard-conf.xml" xpointer="conf" />
+
+  <refsect1>
+    <title>Options</title>
+
+    <para>All options are configured in the
+    <literal>[Journal]</literal> section:</para>
+
+    <variablelist>
+
+      <varlistentry>
+        <term><varname>Storage=</varname></term>
+
+        <listitem><para>Controls where to store journal data. One of
+        <literal>volatile</literal>,
+        <literal>persistent</literal>,
+        <literal>auto</literal> and
+        <literal>none</literal>. If
+        <literal>volatile</literal>, journal
+        log data will be stored only in memory, i.e. below the
+        <filename>/run/log/journal</filename> hierarchy (which is
+        created if needed). If <literal>persistent</literal>, data
+        will be stored preferably on disk, i.e. below the
+        <filename>/var/log/journal</filename> hierarchy (which is
+        created if needed), with a fallback to
+        <filename>/run/log/journal</filename> (which is created if
+        needed), during early boot and if the disk is not writable.
+        <literal>auto</literal> is similar to
+        <literal>persistent</literal> but the directory
+        <filename>/var/log/journal</filename> is not created if
+        needed, so that its existence controls where log data goes.
+        <literal>none</literal> turns off all storage, all log data
+        received will be dropped. Forwarding to other targets, such as
+        the console, the kernel log buffer or a syslog daemon will
+        still work however. Defaults to
+        <literal>auto</literal>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>Compress=</varname></term>
+
+        <listitem><para>Takes a boolean value. If enabled (the
+        default), data objects that shall be stored in the journal and
+        are larger than a certain threshold are compressed before they
+        are written to the file system.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>Seal=</varname></term>
+
+        <listitem><para>Takes a boolean value. If enabled (the
+        default), and a sealing key is available (as created by
+        <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+        <option>--setup-keys</option> command), Forward Secure Sealing
+        (FSS) for all persistent journal files is enabled. FSS is
+        based on <ulink
+        url="https://eprint.iacr.org/2013/397">Seekable Sequential Key
+        Generators</ulink> by G. A. Marson and B. Poettering
+        (doi:10.1007/978-3-642-40203-6_7) and may be used to protect
+        journal files from unnoticed alteration.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>SplitMode=</varname></term>
+
+        <listitem><para>Controls whether to split up journal files per
+        user. One of <literal>uid</literal>, <literal>login</literal>
+        and <literal>none</literal>. If <literal>uid</literal>, all
+        users will get each their own journal files regardless of
+        whether they possess a login session or not, however system
+        users will log into the system journal. If
+        <literal>login</literal>, actually logged-in users will get
+        each their own journal files, but users without login session
+        and system users will log into the system journal. If
+        <literal>none</literal>, journal files are not split up by
+        user and all messages are instead stored in the single system
+        journal. Note that splitting up journal files by user is only
+        available for journals stored persistently. If journals are
+        stored on volatile storage (see above), only a single journal
+        file for all user IDs is kept. Defaults to
+        <literal>uid</literal>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>RateLimitInterval=</varname></term>
+        <term><varname>RateLimitBurst=</varname></term>
+
+        <listitem><para>Configures the rate limiting that is applied
+        to all messages generated on the system. If, in the time
+        interval defined by <varname>RateLimitInterval=</varname>,
+        more messages than specified in
+        <varname>RateLimitBurst=</varname> are logged by a service,
+        all further messages within the interval are dropped until the
+        interval is over. A message about the number of dropped
+        messages is generated. This rate limiting is applied
+        per-service, so that two services which log do not interfere
+        with each other's limits. Defaults to 1000 messages in 30s.
+        The time specification for
+        <varname>RateLimitInterval=</varname> may be specified in the
+        following units: <literal>s</literal>, <literal>min</literal>,
+        <literal>h</literal>, <literal>ms</literal>,
+        <literal>us</literal>. To turn off any kind of rate limiting,
+        set either value to 0.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>SystemMaxUse=</varname></term>
+        <term><varname>SystemKeepFree=</varname></term>
+        <term><varname>SystemMaxFileSize=</varname></term>
+        <term><varname>RuntimeMaxUse=</varname></term>
+        <term><varname>RuntimeKeepFree=</varname></term>
+        <term><varname>RuntimeMaxFileSize=</varname></term>
+
+        <listitem><para>Enforce size limits on the journal files
+        stored. The options prefixed with <literal>System</literal>
+        apply to the journal files when stored on a persistent file
+        system, more specifically
+        <filename>/var/log/journal</filename>. The options prefixed
+        with <literal>Runtime</literal> apply to the journal files
+        when stored on a volatile in-memory file system, more
+        specifically <filename>/run/log/journal</filename>. The former
+        is used only when <filename>/var</filename> is mounted,
+        writable, and the directory
+        <filename>/var/log/journal</filename> exists. Otherwise, only
+        the latter applies. Note that this means that during early
+        boot and if the administrator disabled persistent logging,
+        only the latter options apply, while the former apply if
+        persistent logging is enabled and the system is fully booted
+        up. <command>journalctl</command> and
+        <command>systemd-journald</command> ignore all files with
+        names not ending with <literal>.journal</literal> or
+        <literal>.journal~</literal>, so only such files, located in
+        the appropriate directories, are taken into account when
+        calculating current disk usage.
+        </para>
+
+        <para><varname>SystemMaxUse=</varname> and
+        <varname>RuntimeMaxUse=</varname> control how much disk space
+        the journal may use up at maximum.
+        <varname>SystemKeepFree=</varname> and
+        <varname>RuntimeKeepFree=</varname> control how much disk
+        space systemd-journald shall leave free for other uses.
+        <command>systemd-journald</command> will respect both limits
+        and use the smaller of the two values.</para>
+
+        <para>The first pair defaults to 10% and the second to 15% of
+        the size of the respective file system. If the file system is
+        nearly full and either <varname>SystemKeepFree=</varname> or
+        <varname>RuntimeKeepFree=</varname> is violated when
+        systemd-journald is started, the value will be raised to
+        percentage that is actually free. This means that if there was
+        enough free space before and journal files were created, and
+        subsequently something else causes the file system to fill up,
+        journald will stop using more space, but it will not be
+        removing existing files to go reduce footprint either.</para>
+
+        <para><varname>SystemMaxFileSize=</varname>
+        and
+        <varname>RuntimeMaxFileSize=</varname>
+        control how large individual journal
+        files may grow at maximum. This
+        influences the granularity in which
+        disk space is made available through
+        rotation, i.e. deletion of historic
+        data. Defaults to one eighth of the
+        values configured with
+        <varname>SystemMaxUse=</varname> and
+        <varname>RuntimeMaxUse=</varname>, so
+        that usually seven rotated journal
+        files are kept as history. Specify
+        values in bytes or use K, M, G, T, P,
+        E as units for the specified sizes
+        (equal to 1024, 1024²,... bytes).
+        Note that size limits are enforced
+        synchronously when journal files are
+        extended, and no explicit rotation
+        step triggered by time is
+        needed.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>MaxFileSec=</varname></term>
+
+        <listitem><para>The maximum time to store entries in a single
+        journal file before rotating to the next one. Normally,
+        time-based rotation should not be required as size-based
+        rotation with options such as
+        <varname>SystemMaxFileSize=</varname> should be sufficient to
+        ensure that journal files do not grow without bounds. However,
+        to ensure that not too much data is lost at once when old
+        journal files are deleted, it might make sense to change this
+        value from the default of one month. Set to 0 to turn off this
+        feature. This setting takes time values which may be suffixed
+        with the units <literal>year</literal>,
+        <literal>month</literal>, <literal>week</literal>,
+        <literal>day</literal>, <literal>h</literal> or
+        <literal>m</literal> to override the default time unit of
+        seconds.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>MaxRetentionSec=</varname></term>
+
+        <listitem><para>The maximum time to store journal entries.
+        This controls whether journal files containing entries older
+        then the specified time span are deleted. Normally, time-based
+        deletion of old journal files should not be required as
+        size-based deletion with options such as
+        <varname>SystemMaxUse=</varname> should be sufficient to
+        ensure that journal files do not grow without bounds. However,
+        to enforce data retention policies, it might make sense to
+        change this value from the default of 0 (which turns off this
+        feature). This setting also takes time values which may be
+        suffixed with the units <literal>year</literal>,
+        <literal>month</literal>, <literal>week</literal>,
+        <literal>day</literal>, <literal>h</literal> or <literal>
+        m</literal> to override the default time unit of
+        seconds.</para></listitem>
+      </varlistentry>
+
+
+      <varlistentry>
+        <term><varname>SyncIntervalSec=</varname></term>
+
+        <listitem><para>The timeout before synchronizing journal files
+        to disk. After syncing, journal files are placed in the
+        OFFLINE state. Note that syncing is unconditionally done
+        immediately after a log message of priority CRIT, ALERT or
+        EMERG has been logged. This setting hence applies only to
+        messages of the levels ERR, WARNING, NOTICE, INFO, DEBUG. The
+        default timeout is 5 minutes. </para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>ForwardToSyslog=</varname></term>
+        <term><varname>ForwardToKMsg=</varname></term>
+        <term><varname>ForwardToConsole=</varname></term>
+        <term><varname>ForwardToWall=</varname></term>
+
+        <listitem><para>Control whether log messages received by the
+        journal daemon shall be forwarded to a traditional syslog
+        daemon, to the kernel log buffer (kmsg), to the system
+        console, or sent as wall messages to all logged-in users.
+        These options take boolean arguments. If forwarding to syslog
+        is enabled but no syslog daemon is running, the respective
+        option has no effect. By default, only forwarding wall is
+        enabled. These settings may be overridden at boot time with
+        the kernel command line options
+        <literal>systemd.journald.forward_to_syslog=</literal>,
+        <literal>systemd.journald.forward_to_kmsg=</literal>,
+        <literal>systemd.journald.forward_to_console=</literal> and
+        <literal>systemd.journald.forward_to_wall=</literal>. When
+        forwarding to the console, the TTY to log to can be changed
+        with <varname>TTYPath=</varname>, described
+        below.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>MaxLevelStore=</varname></term>
+        <term><varname>MaxLevelSyslog=</varname></term>
+        <term><varname>MaxLevelKMsg=</varname></term>
+        <term><varname>MaxLevelConsole=</varname></term>
+        <term><varname>MaxLevelWall=</varname></term>
+
+        <listitem><para>Controls the maximum log level of messages
+        that are stored on disk, forwarded to syslog, kmsg, the
+        console or wall (if that is enabled, see above). As argument,
+        takes one of
+        <literal>emerg</literal>,
+        <literal>alert</literal>,
+        <literal>crit</literal>,
+        <literal>err</literal>,
+        <literal>warning</literal>,
+        <literal>notice</literal>,
+        <literal>info</literal>,
+        <literal>debug</literal>,
+        or integer values in the range of 0..7 (corresponding to the
+        same levels). Messages equal or below the log level specified
+        are stored/forwarded, messages above are dropped. Defaults to
+        <literal>debug</literal> for <varname>MaxLevelStore=</varname>
+        and <varname>MaxLevelSyslog=</varname>, to ensure that the all
+        messages are written to disk and forwarded to syslog. Defaults
+        to
+        <literal>notice</literal> for <varname>MaxLevelKMsg=</varname>,
+        <literal>info</literal> for <varname>MaxLevelConsole=</varname>,
+        and <literal>emerg</literal> for
+        <varname>MaxLevelWall=</varname>.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>TTYPath=</varname></term>
+
+        <listitem><para>Change the console TTY to use if
+        <varname>ForwardToConsole=yes</varname> is used. Defaults to
+        <filename>/dev/console</filename>.</para></listitem>
+      </varlistentry>
+
+    </variablelist>
+
+  </refsect1>
+
+  <refsect1>
+      <title>See Also</title>
+      <para>
+        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+        <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+        <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+        <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+        <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+      </para>
+  </refsect1>
 
 </refentry>